Pengembangan lembar kerja siswa (LKS) materi segiempat untuk siswa kelas VII SMP berbasis penemuan terbimbing

Abstract

The aim of this research is development of students worksheet of quaddrilaterals for grade VII high school based on guided discovery which is valid, practical and effective. The development model was used modifies the Plomp’s model 2010.  The Plomp’s model (Hobri, 2010:17) consist of 3 phase, (1) Premilinary research phase, (2) Prototyping phase, and (3) Experiment and assesment phase. Based on analysis results, researcher obtains results as follows: First, the student worksheet that developed by the researcher were valid with the average result of validation is 3.65, so the student worksheet already considered proper that could implemented for the students with revision, Second, practical testing result showed that student worksheet could accomplish practical with the average result is 3.8, Third, this student worksheet is effective because 100% of the students has finished the test.